Singer/songwriter Matt Nathanson makes his first Chevalier Theatre appearance with a stop on his King of (un)Simple Tour. A native of Lexington, Massachusetts, Nathanson sings a blend of folk and rock ‘n’ roll music and plays acoustic and electric guitar. His sixth studio album, “Some Mad Hope,” yielded his breakthrough multi-platinum hit “Come on Get Higher.” Singer/songwriter and pianist Rachael Yamagata opens. Tickets are $45 to $75 through the Chevalier Theatre website/Ticketmaster. To avoid online ordering fees, purchase tickets at the Chevalier Theatre Box Office, which is open on Fridays and Saturdays from noon to 6 p.m., as well as two hours before every Chevalier Theatre show.